Electrically-operated type-writer.



P. c. RAwLs. y

ELECTRICALLY ORERATED TYPE WRITER. 'A'PLlcATloN men rsa. 3. 19u.

1 P. C. RAWLS. ELEcTmcALLY oPEnMEo TYPE WRITER.

' APPL1cAT1o11-r1LED ri, 3. 1911. 1 I' 1,186,941 Patented June 13, 1916.

"2 SHEETS-sneer 2.\ 1

Q Q G Q om# hm mm. QN Nm Nm Q To all whom it may concern:

UNITED STATES :PATENT l PAUL C.; 'AWLS? QF DES MINES, IOWA, AssIGNoR To ERNEST Hansa-ane, or cama 4s CITY, Iowa.

Specification of Letters Patent.

Application med February s, 1an] serial No. 606,324.

i Be it known that I, PAUL C. RAwLs, a citizeny of the United States, residing at Des fMoines, in the county of Polk and State of Iowa,lliave invente-d a certain new and useful Electrwally-Operated Type-Vriter, of

lwhich the following is a.- specification; l

My invention relates to that classfof type- 'writersf in which the operator need apply only a slight pressure lto the keys and the corresponding tvpe bars will then be automatically actuated by electricity.

More specifically it refers-to certain improvements in' electrically operated type writers such as illustrated and described in the application of 'Ernest Hausberg, for

United States Letters Patent, tiled October 13, 1909, "Serial Number 522,413, 'Patent fr-.156.288, oct. 12, 1915.

The ob'ect of my present invention is to prov-1de means of a simple, durable and 1nexpensive constructionf whereby the establisliment, by a cdntact -at a. key, of a circuit 'through anyT one of the selective magnets will automatically, and without any action or yeffort of the selective magnet itself'or its armature, establish a second and independent'cir'cuit through the universal operating magnet.

Affurther objectl is'to provide improved means of simple. durable and inexpensive construction whereby the establishment ot a circuit by an electriccontact at a key will cause the operating magnet tooperate a type bar through a fullstroke even though the contact at the key be broken before the stroke is completed.

'A further object is toprovidesmeans of simple,

durable and inexpensive construction for causing a type harto be moved to .printing positionfuponthe establishment of a contact at a key and to be returned to normal position even though the operator fails to remove his finger from the key and the contactremains unbroken.

vfurther object is to provide an arrangement of selective magnets and type bar operating devices that will be simple, durable, compact and not likely to get out of order:

My invention consists in certain details, in theconstruction, arrangement and combination of the various parts of the device,-

whereby the objects contemplated are attained, as hereinafter moretully set forth,

4pointed` out in my claims and illustrated in the accompanylng drawings, 1n which Flgure 1 shows a vertical, central, sectional view of a -ty'pewriter embodying my, `invention, and F 1g. 2 shows a topl or plan.

. ner ends on the cross bars'15 from which they are insulated by the strips-16. Introduced at the rear of the frame are the electrical conducting wires 17 and 18 designed to be'connected to a suitable source of 'elec'- trical supply not shown. The wire 18 isconnected to a conductor plate 19v insulated from the frame by the insulator strip 20. Below each row of keys is a conductor cross piece 21v in electrical vconnection with the conductor plate 19 and in vposition to be engaged by the forward end ofthe adjacent conductor spring 14 when the corresponding key is depressed. Connected with each of the conductor springs 14 is a conductor wire 22 connected with an electromagnet 23. From each of the electromagnets 23 there is a conductor wire 24 leading to a universal conductor rod 25 which is connected to the wire 17 so that upon the depression of any k'ey bar a circuit is established through one of theelectromagnets 23. It is essential thatv there be one electromagnet 23 for each key andl in order to assemble the comparatively large number of said electromagnets re# quired in a machine-of this kind I have arranged them' in two rows, the lower row be# ing supported on a cross bar 26 and the up per row being supported on a cross bar 27 whlchv is above and 1n the rear of the cross Mbar 26', and the magnets 23 ofthe upper row are arranged in staggered positions relative to those on the lower row, as clearlyshown in Fig. 2. These magnets 23 will be herelnafter referred to as selective ll'lagnets and vthere is provided foreach' ofsaidselective v'I r'lagneips'fa correspon'dingtype bar and a series of levers for operating it. At a point between ,Y the two rows of selective electro magnets is' a' supporting cross bar 28 andl lfor each selective magnet there is an a'rniaf ,ture'29 pivotbd to the cross bar 28 and hav-` i are in line.

v ing'a lever'30 fixed toit and extended rearwadly and provided at its rear end with a sljlitl 31. The armatures for the upper row of f .wardly toward the magnet and the corre-V spondin'g lever is moved downwardly at its rear end. This arrangement of parts makes v averycom )act andl inexpensive construc' tion well adapted for the work for which y it is intended.

The type bars are indicated by the nu moral 32. and are of the ordinary construction designed to coperate with the platen in the ordinary way. For each type bar there is a link33 and a lever 34 connectedv with said link. These levers 34are pivoted y toa cross bar 35 and there is a link 36 for each of'k said levers between its upper and lower end. a lever 37 hereinafter referred to as the type bar operating lever. Each of the levers 37 is-provided with a hook 38 extended rearwardly `and with a pin 39 to enter the slot 31 of -the corresponding lever ,30. The lower endk of each ofthe type bar-operating levers 37 is pivoted to an arm 40 and these arms 'are all pivoted to a cross bar 41V and said arms l:extend rearwardly from their pivotal point. A spring 42 is provided for each ofthe arms/l0 Ato yieldingly hold it and the type bar operating lever 37 to its upward limit of' movement. Theoperation of this part of the device is as follows: Assuming the parts tobe in the positions shown in Fig. 1. and assuming that any one of the'keys is depressed, then a circuit is established-| through the corresponding selective magnet. The corresponding lever 30 is/depressed which carries with it the corresponding type bar operating lever.

' 'i thus moving the hook 3S downwardly. This lmovement of course does vnot in any `way affect the type bar which is moved by a universal operating` bar hereinafter described. and immediately upon the breaking of the circuitthe spring 42 will elevate the i so; that the disengaging movement of the ho'ks 5I and 55 may be made to take place type bar operating' Alever 37.

The y mea-nsf forI producing l a striklng Each link 36 is connected -tomovement of the particular type bar corresponding to the key that has been depressed comprises `an electromagnet 43 hereinafter referredto as the operating magnet. ox; universal operating` magnet and which is connected by .fi wire 44 with the wire 17 andl a wire 45 leads from the 'operating magnet 43 to the-wire 18, there being in? eluded in'sald wire 45 'a circuit making and breaklng device hereinafter described,

The armature forthe operating-magnet is.

indicated by the numeral 46 and is carried by a bell crank' lever 47 ful'crumed-a-tl 48."

One' end of the bell crank lever-extends 'forwardly and is designed to engage a cross piece 49 to limit the forward movement of the armature 46 ina *direction-'away from the ,magnet forwardly extended arm providedgwith a designed to coact withjasecond-bell crank Carried by ther-arma* ture 46 vis a bell crank lever 50 havingits.

lever, 52, which lever is fulcrunied at 53 to' a universal type bar bprating bar 5 4 'and 'said bell crank lever 52'provided altits rearwardly extending endwith a. hook';

and it is also provided with* a downwardly projecting arm. The saidv hooks 51 'fand 5'5.

are designed to coact with. each otherfin 'such al manner lthat when 'they are'in gagement as shown in Fig. 1 andthe armature 46 is moved rearwardly the bar. 54

will also be moved 'frearwardlyandlwh'en the hooks /51 and 55 have kbeen separated:v and the armature 46 moves fo ardlyftlie said :hooks will rengage with ea other." 'I order to provide,forrautomaticallyf-re.

leasing the hooks-51 and 55, I have'pro'f; vided a plate 56 slidingly and adjstabl'y supported' on the 'block 57 by meansmf a set lscrewl 58. This plate `is provided with a slot 59 through which, the downvitgu'dly4 extended arm of the level-.50 is projected-- and the forward edge 'oit-saidplatez 56 said levers 50 andv '52 are jointly -moved rearwardly toward the. operating'mag'net,

they will `both move a short distance and/ then the downwardly projecting'armofeach will strike upon a parto'f the plate 56. This will cause the hook 51 to move upwardly and the hook 55 to move down wardly. In order tol provide for adjust-f i' ing the plate 56 so that this releasing movement of said hooks will take 'place in proper time relativeto 'the operation of the type bars, I havev lgreovided a screw threaded rod 60 in the machine frame seated in a block 61- on the plate 56 so that fthe operator may. py-manipulating this rod 60,

adjustl the plate 56 forwardly or rearwardly 110' stands in posit-ion'close to the downwardly projecting arm of the lever52'so that asf' desiredtime relative to the operav`tions of the otherv partsgof the machine. l

` so that, the hooks will not be released'; a

contact at the key then serving simply to causev the type bar to strike against the platen but-not to return to normal position without a release of the key.

The universal type bar operating bar 54 extends transversely across the machine and is supported at its ends by the arms 61a pivoted to the sides of the machine frame so that said bar 54 may swing forwardly and rearwardly. The upper edge of said bar is.

preferably beveled at 62 in an upward and rearward direction. A contractible coil spring 63a is provided for normally holding the bar 54 to its forward limit;y There is also a contractible coil spring 64 yfor holding the bell crank lever 47 and the armature 46 to its forward limit. The operation of this part of the device is as follows: Assuming that one of the type bar operating levers 37 has been moved downwardly, as previously set forth, its hook 38 will then be in the rear of the bar 54,'tl1en'upon the establishment of a circuit through the operating magnet the armature 46 will be thrown rearwardly and.

this will cause the engaging hooks 51 and 55 to move the bar 54 rearwardly. This rearward movement of the bar 54 will move the upper end of the lever 37 rearwardly which will operate the corresponding type bar. During'the rearward' movement of the lever -37 the pin 39 will slide rearwardly in the slot 31 of the lever 30, so that after the hook 38 hasbeen moved into position for engaging the bar.54, the operation of the type bar is effected without moving the selective magnet or its armature or affecting the relation between them. As soon as the type bar movement lhas progressed to the desired amount lfor practical use the downwardly extending arms of the levers 50 and 52 will strikey upon ftheir corresponding portions of the plates 56 so that said hooks will be released and as soon as they are released the spring 63:L will move the bar 547forwardly to its' normal position, -and as soon as the armature 46 is released from its magnet the spring 64 will move it to its forward limi/t and when in this position the hooks 51 and v 55 will rengage with each other lready for another operation.

The means for 'establishing a circuit through thev operating magnet. and for maintaining it until 'the completion of the operating stroke of a type bar, regardless of the' time 'when the initialhfcircuit through the selective magnet is broken, comprises 'the following mechanlsm.; the nu'- meral 63 indicates an electromagnet connec-'ted at both ends` with the wire ,18; This magnet, which is seen to bein circuit magnet.. 'Pivotally supportedv adjacent to the electromagnet 1s a lever '64 carryingA an armature 65 'at`one end vto coperate;vvitlf the magnet and having .thereon a c1rcut` .ranged that when thearmatureisdrawn to the magnetthe contact arms` 66 andf69 will be in engagement. The said arm 69 is con'- nected electrically with the wire 18" by the wire 7 0.

Mounted on the machine frame is a locking lever 71 having a shoulder72 andY an the path of -the armature 46. A spring" 7 4 is provided for normally holding the 'arm 73 in a direction away from the operating mag"n net 43. The practical operation of this part 'with leach of the selective magnets, 'may be i' referred toas a circuit` closing, orfrelay,A

larm 73 arranged to project downwardly in" of the device is as follows: .When the'parts are in the positions shown in Fig. 1 anda circuit is established through ,the wire 18 by the depression yof any' key, then the electro-v magnet 63 is energized and the armature 65 is drawn toward it. This will cause the cir-v cuit closing arms 66 and 69 to 'engage with each other and close a circuit through the electromagnets 43 and it will alsobring the locking arm 67 into position in engagement with the shoulder 72 of the le-ver'71. These parts will obviouslybe held in this position bv means of the locking arm and coacting 'shoulder until such time as the'armature 46 moves toward its magnet 43, whereuponA the upper end of the arm 71 will be moved forwardlv and downwardly to thereby release..

the ldcking arm 67 from the shoulder 752.,V

whereupon, when the circuit is, broken, the armature 65 may move awayV fromf'its magnet and' assume the position show-n in Fig. 1, 1

thus breaking the circuit throughithe circuit closing arms 66 and 69. Obviously however this circuit cannot be broken through the operating magnet 43 until after the .arma- -ture 46 moves toward' the magnet/43 and a type bar stroke has been completed. y

In order tofprevent sparking between l the` contact springs 14 rand the cross 1"odse2-1',

I have provided a condenser 475 electrically connected with the wires 17 and 18""a`nd properly insulated from'the fr ame v,of the machine by the insulating materlal 7 6. The operationof this condenser 1s asrfollows;

'When a `circuit has been established tliroii'glif l., 'any vof the selective magnets then thecur'- rent is free to 'flow into the condenserand as soon as the circuit is broken at any key, the current will be. `absorbed by thel cone 6o complete 4its operation regardless of the denser to such lan extent as to prevent sparking between'tlie contact points ofthe springs 14a-nd' the 4cross rods 21, thus avoiding the burning out' of the electric Contact points theseyplaces."

1 *In' `.practical opera-tion with my complete typewriter any type barmay be operated bv lsuch ,pressure upon the corresponding key ',aslis necessary to. movethe key supporting contact spring 1i downwardly into engage- :gment with its corresponding rod 21 and .it

does not 4matter,how-light or how. heavythe pressure on the key may be so long as y this" v single fresult is accomplished.

"g In 'practice I preferably lu se relatively light springs 14 so that a very slight pressure'upon any key is all that isnecessary y-tocomplete t-lie circuit. By this arrangement, I `have found that the speed of operation by an ordinary operator. may bey increaseflto a very considerable extent on account ofthe fact that it is necessary only to toucha linger to a type 1key and the oper-` vator need not exert the force upon eachfkey necessary to -operatel the entire .type bar mechanism and he need not exercise any care whatever asv to lthe uniformity of the pressure upon the lvarious keys. Immedikately-upon' the 'establishment of a circuit through a spring 1l. and .the corresponding cross piece'-2l a' circuit is established in the corresponding .selective magnet. This iinmediately 'movesthe type bar operating lever downwardly so thatits hookBS is in the reali' of the upper edge of the universal type bar operating'bar 5-1. At thesame time as the circuit is established through-one of they selective magnets 23 a circuitis also establishedV through the electromagnet 63 and 'lits armature is drawn to the magnet anda 'mentis that, although the Contact for closl ing the circuit of-.tlie power magnet is made when the selective armature is drawn to-v Wa-rd 4its* magnet, yet the movement of the .selective armature itself does not make the Contact, the selective magnetbeing relieved. of eyery function. except that of moving tlie type bai' operating mechanism into position forbeing operated. l

Another off'the advantages of my improvement i'sthat the key need only be depressed for the shortestpossible" space of time and thereafter the mechanism that. 4operates the corresponding key bar will period 'of time when the operator releases the key for the reason that a circuit is cstablished .through the operating magnet .and this circuit is maintained until it.is

. In a machine o f this class it iI obvious that the .impact of all lof the type bars upon the,"l platen will be substantially uniform for the reason that each type barl is operated by the same operating mechanism.

. "llie lautomatic circuit closing devicecomprising the electromagnet 63, the lever 64 and the locking lever 71 perfoiins a very :advantageous result in machines of this y. kind 1n that it insures the positive operatioirof the operating magnet and a' full stroke-of each type bar regardlessy of the amount'of time that any of .the keys has been` depressed.v l

Another yadvantageous feature of my invention is the arrangement of the mechanism for connecting the type bar operatinglevers ''with the universal bar 54. In thisoonnection the arrangement is such as to avoid all vpossibilit-y ot' any ofthe hooks 3.8 remaining in such. position as toengage the universal bar 54 at any time other than the time whenthe corresponding' key is depressed. In this connection it is to be understood that the fcoacting hooks 51 and 55 aic automatically released from veach other duiingthe time that the armature. 4.6 moves to its magnet and the time of such release may be varied to vsuit the requirements by a manipulation of the screw threaded rod 60. Therefore as soon as the hooks are released the universal bar 5l returns to its normal position as shown in Fig. 1, thus immediately throwing it forwardly out of contact with the corresponding hook 3S which is then free to rise by the pressure of its spring '-12 during the time that the typebaris returnv'ing to its normal position.v lVith a rigid connection between the universal bar -t and the ariiiatui'ellG the said har would be held at its rearward limit ofmovement until the "prior `to the time that the armature -LG strikes its operating magnet and the universal har 5l is immediately returned by its spring to normal 'position which may be a considerable period of time prior to the time -wheii the armature -l returns to its normal position. v

Another advantageous feature of my iuyeiition is the employment of a condenser Ain machine of this class for the purposey 'Ic-laila asniy invention:

In an ,electrically operated typewriter,

'thef'combination of keys," selective electro- 1nagiiets. 'ineansfor establishing an electric circuit through aA correspomling selective magnet when a 'key 1s depressed, type bars,

atypebar operating ydevice for each typel bar,vmeans actuated by a selective magnet for moving the type bar operating 1nech.

anism of vacorresponding type-bar to position for another 'operation upon the com- V 4pletion of an electriccircuit through the selective electromagnet, a universal operating electromagnet, an armature for it, means operated by said' armature for operating a type bar operatlng device when the latter has been moved to position foi-'beingv operated,l a relay magnet included 1n the circuit with the .selective magnets, an armature therefor, a circuit making and breaking device included in the circuit for the operating;inagnet,said device being operated to close the circuit when theA said relay armature is drawn toward its magnet, and a latch` device for the circuit making and breaking' device arranged to be automatically released by the. movement of the armature of the operating magnet in' a direction toward its magnet. e

2. In an electrically operated typewriter, the combination of keys, selective electromagnets,.means for'establishing an electric circuit through a corresponding selective magnet when a key is depressed, type bars, a type bar operating device for each type bar, means .actuated by a selective magnet for moving the type'bar operating'mechanism of a corresponding type bar to position for. anotherv operation upon the completion of an electric circuit through .the selective electromagnet, a universal operating electromagnet, an armature 4for it.'y

means operated by said armature for opei'- ating a type ba'1"operating device when the latter has beenmoved to position for being operated, a relay magnet included in the circuit. with thesclective magnets, an armature therefor. a circuit making and breaking device included in the circuit for erating magnet. said device being operated to close the circuitl when the said. relay armature is drawn 'toward its magnet, af

latch device. for Vthe* circuit" making and breaking devleearranged to-be automatically released by the inovementof the arma-` ture of the operating magnet in a direction toward its-magnet, and-va springfbr normally holding the circuit making and breaking device in open position.

A3.., In an electrically operated typewriter, the combination of keys afs'lelective elecv tron'iagnet for eachr key, means for estab- :shing an electric circuit through a corresponding selective magnet when a key is de'- pressed.- typebars, a-type bar operating'dethe type vbar operating device when the latter has been moved to position for being operated, an electromagnet connected in serles with each ot the selectivev magnets, and

means operated by said magnet for establishing a circuit through the operating magnet.

4. In an electrically operated typewriter, the combination( of a series of selective electromagnets, said magnets being arranged in `two rows, one'a'bove the other, and one of the rows heilig in the rear of the other, and the magnets of the upper row being arranged n positions staggered with relation to those of the lower row, a -cross bar between the two rows of magnets, an arm for each magnet connected to said cross bar, an armature on each arm adjacent to the corresponding magnet, an arm for each ofl e vice for each type bar, means actuated by a said armatures, allof the latter arms being extended in the same direction, and said parts belng so arranged that when an armature of the upper row is moved toward its magnet it will move its said arm downwardly and when an armature of the lower row is moved forwardly toward its magnet 1t will also move lts said arm downwardly, type bars, and a type bar operating devlce v:tor each type bar, each of said type bar operating devices being operatively connected with one of'said arms', for the purposes stated. y

5. ln a typewriter of the class described, the combination of type. bars, a type bar operating device for each type bar, a hook foreach type bar operating device, a bar in positionY adjacent to said hooks, means for moving'any one of said rhooks to prisa-"'- tion for engaging said bar, an operating magnet, an armature therefor, two connecting hooks, .one being connected with4 said armatureand the other with said bar and beingdesigned to engage each other, and means'automatically operated by the movement of the armature toward its magnet for releasing said hooks.

G. In a typewriter of the class described,

thel combination of type bars, a type bar operating device for each type bar, a hook for each type bar. operating device, a bar in posinon/adjacent to" saidy hooks,A meansfor moving any onel offs'fnd hooksto posit1on atedv by-said armature for operating a type bar operatingdevice when the latter has been moved' to operative position, a magnet in circuit with each of the selective magnets,

an y'armature therefor, and means operatively connected with .said armature, and actuated uponl and ,"by the-completion of a circuit through any selective magnet, for establishing a circuit through the universaloperating magnet.

13. In an electrically operated typewriter, 'the combination of keys, selective magnets,

p armatures therefor, type bars, a Iuniversal operating magnet, a.- universal bar operatlvely connected therewith, a' type bar operating device foreach type bar including a lever capable of up and down movement and pivotally supported at one end so as to be Capable also of movement backward and forward, an arm operatively connected with a selective armature and vin sliding engagement with -said lever, and a hook for said lever designed to engage the universal bar when a corresponding selective magnet is energized. f

14. Inan electrically operated typewriter, the combination of keys, type bars, a circuit closerffor each key, a series of selective magnet for establishing a circuit through the 1 nets, a universal operating magnet, a magnet in circuit with each of said selective magnets, and means operated by said maguniversal operating magnet.

15. In an electrically operated typewriter, the combination of keys, type bars, a. circuit closer for each key, a series of selective magnets, a universal operatingmagnet, a magnet in circuit ,with each of said selective magnets, an armature therefor, means operatively'connected witlnsaid armature for .making an electrical Lcontact for establishing a circuit through the vuniversal.operating magnet, and a latch fon maintalning said contact. v y

16. In an electrically operated typewriter of the class employing selective magnets for moving type bar devices to posltion to be voperated and a universal operating magnet for moving the selected type bar device to printing position, the combination of a magnet in .circuit with each of said selective magnets, an armature therefor, and means operatively connected with said armature for closing the'circuit of the universal operating magnet.

17. In :1n-electrically operated typewriter of the class employing selective magnets for moving type bar devices to position to be operated and a universal operating magnet,

for moving the selected type bar device to printing position, the comblnatlon of a magnet -in circuit with each of said selective magnets', an armature therefor,means operatively connected with said armature for closing the circuit of the universal operatlthe selective magnets and a universal oping magnet, and a latching deviceffor-hold-" ing itin closed position.

18. In an electrlcally operated typewriter the combinationl of keys, a' series of falcev v tive magnets connected with thekeys, type bars, an operating magnet for operating ya.,

type bar when the operating magnet isen-i ergized, a relay magnet energized upon and by thek completion of acircuit through any selective magnet, means operated by the said relay magnet for closing the circuit through the operating magnet, and means for keeping it closed. While a type bar is being operated. y

19. I n an electrically operated typewriter, the combination of keys, selective magnets, a relay magnet, Ameans for energizing a selective magnet andthe relay magnet bya single electrical contact at a key, type bars, an operating magnet, means for the operation of the type bars by the operating magnet, and a switching device operated by the relay magnet for closing the circuit through the operating magnet and keeping it'closed while avtype bar is being operated.

20. In an electrically operated typewriter,

the combination of keys, selective,magnets,v

a relay magnet, means for energizing a-selective magnet and the relay magnetby a single electrical contact at a key, type bars, an 'operating magnet, means for the operation of the type bars by the operatinmagnet, and a switching device operated y .the relay magnet for closing the circuit through the operating magnet. y

21. In an electrically operatedA t pewrite'r of the class employing a series o selective magnets for movin type bar devices to position to be operate pivoted armatures for eratingmagnet, for moving the selected type bar device :to printing position, the combination of levers each operatively con nected at one end with a type bar device and at the other with the, said pivotedarmature of a corresponding selective magnet, the said armatures extending alternately upf ion wardly and downwardly and the corre'- Y spending selective magnets being arranged l ntwo' rows so as to draw said 'armatures backward and forward respectively for the purpose of bringing the type bar devices into position to be operated.

Q2. In anelectrlcally operated typewriter, i'

the combination of type bars, a type bar opfmenen-rimanere.

"ifi

,y 23.5In a'n electrically operated typntflziter,

bar, allf-"jmen's' :for "eii'ecting an Operative c'olmectlon--lA 'tween a type bar andthe unilwrsal when a-K corresponding gseie'ctix ature-Is moved, said means including "eler'neni',l whereby the univesniizb rating ,bar may move and the corresponiiingjarmature and itsmagnet may v remain'stationary.`

, lIn'afn -electricalbT operated typewriter,

, theeom'binatiqn Qf, aV series of selective magtype bars,

nets;- armatures for said magnets, a Auniversal operating bar for said typebars, a-series of. type bar operating 'devices each comprising`-"a-lever- -having .a hook rigidly connected to it, the said lever being capable of bodily longitudinal movement whereby A movement whereb its 'hook may be brought .;ntcoperative relaii-comblnatlonof keys selective magnets 1, .othe lgeys,.jansarmature for each selective `a universal operating v i0n-wth fthe' universal-'operating bar, and the .Said Vle crabe-being capable of ivotal a movement oli-t e universal operating ar will veliz'ect a printing movement of'- the corresponding type bar,

mand means for connectmg thel armatures' Witb the said levers for moving them longitudlnally when an armature is attracted to its magnet, said connectlon between the ar matures and the said levers including a sliding element, .whereby the Aselective magnet .and its armature may remain stationary during the' pivotalvm'ovement of the said lever.A Des Moines, Iowa, December Q2, 1910.v

v PAUL C. RAWLS. Witnesses: l v

EDW. T. BARTLE,v I WM. A. JACOBS. 

